CN101752943B

CN101752943B - Spindle motor

Info

Publication number: CN101752943B
Application number: CN2009102500769A
Authority: CN
Inventors: 尹皓业
Original assignee: LG Innotek Co Ltd
Current assignee: Hitachi LG Data Storage Korea Inc
Priority date: 2008-12-03
Filing date: 2009-12-03
Publication date: 2012-12-12
Anticipated expiration: 2029-12-03
Also published as: KR20100063404A; US20100133960A1; KR101020798B1; US8148882B2; CN101752943A

Abstract

A spindle motor is disclosed, wherein the spindle motor is formed at an outer periphery of a first protruder of a bearing housing having a gap relative to the inner periphery of the coupling hole of a base with a guide portion contacting an inner periphery of a coupling hole, whereby, the bearing housing is not moved on the base by the guide portion, and whereby the bearing housing is always coupled to a predetermined area of the base, such that when the base assembled with parts is coupled to the product, the parts are always positioned at a predetermined area of the product, thereby improving product reliability.

Description

Spindle motor

The cross reference of related application

The application based on and the application number that requires to submit on December 3rd, 2008 be the priority of the korean patent application of 10-2008-0121908, at this it openly is incorporated herein by reference in full.

Technical field

The disclosure relates to a kind of spindle motor.

Background technology

Spindle motor is carried out the function of rotary CD, so that can the data of reading and recording on CD at the reciprocating optical pickup apparatus of CD drive (ODD) neutral line.

Usually, spindle motor is equipped with rotating shaft and the bearing that supports this rotating shaft.Bearing is inserted in the bearing housing, and bearing housing is fixedly mounted on the base of optical device or electric machine support.

Summary of the invention

Purpose of the present disclosure provides a kind of spindle motor, and it can be couple to bearing housing the presumptive area of base, thereby strengthens the reliability of this spindle motor.

According to an aspect of the present disclosure, above-mentioned purpose realizes that through following spindle motor this spindle motor comprises: base forms on it and couples the hole; Bearing housing, it has through filling and is inserted into said first convexity that couples in the hole, and is vertically mounted on the said base; Be fixed on the inner bearing of said bearing housing; Can support ground and be rotatably installed in the rotating shaft in the said bearing; Be couple to said rotating shaft with said rotating shaft rotor rotated simultaneously; And around the stator of said bearing housing layout with rotating said rotor, wherein said first convexity is formed with the said guidance part that couples the inner edge in hole of contact in its outer rim.

Description of drawings

Fig. 1 a is the sectional view of major part of the spindle motor of the exemplary embodiment that is used for fabricating with disclosure conduct relatively;

Fig. 1 b is the enlarged drawing of Fig. 1 a " A ";

Fig. 2 is the sectional view according to the spindle motor of exemplary embodiment of the present invention;

Fig. 3 is the enlarged drawing of Fig. 2 " B ";

Fig. 4 is the perspective view of bearing shown in Fig. 3 and bearing housing;

Fig. 5 is the sectional view according to the amplification of the major part of the spindle motor of another exemplary embodiment of the present invention.

Embodiment

Fig. 1 a is the sectional view of major part of the spindle motor of the exemplary embodiment that is used for fabricating with disclosure conduct relatively, and Fig. 1 b is the enlarged drawing of Fig. 1 a " A ".

With reference to figure 1a and Fig. 1 b, base 11 forms perpendicular to bearing housing 15, in said bearing housing 15, via the bearing (not shown) rotating shaft (not shown) is installed rotatably.The bottom of bearing housing 15 is inserted into and is formed at the coupling among the 11a of hole of base 11, with by filling be couple to base 11.

At this moment, in the bottom of bearing housing 15 outer rim with couple between the inner edge of hole 11a and have gap (G1), be easily inserted into the bottom that allows bearing housing 15 and couple among the 11a of hole.

In the exemplary embodiment of fabricating of the present invention, because in the bottom of bearing housing 15 with couple and have gap (G1) between the 11a of hole,, then there is similar big assembling deviation with gap (G1) if bearing housing 15 is couple to base 11.

Because said assembling deviation, as having assembling deviation between the rotating shaft of pivot and the product, this assembling deviation and gap (G1) almost greatly, thereby this rotating shaft has departed from the precalculated position of product, has damaged reliability of products thus.

Fig. 2 is the cross-sectional view according to the spindle motor of exemplary embodiment of the present invention, and Fig. 3 is the enlarged drawing of Fig. 2 " B ".

Referring to figs. 2 and 3, provide to be formed with the base 110 that couples hole 112.Below, comprise the direction and when surface of the component parts of base 110 in description, be called " upper surface and upside " towards the surface and the direction of the vertical upper side of base 110, and be called " lower surface and downside " towards the surface and the direction of the downside of base 110.

Base 110 is installed perpendicular to bearing housing 120.Bearing housing 120 is set to the cylindrical of bottom opening, and the rear surface of bearing housing 120 is formed with first protruding 122 and second convexity 124, and wherein each is spaced apart with preset distance.

First protruding 122 be inserted into couple in the hole 112 and filling therebetween, bearing housing 120 couples with base 110 thus.Second protruding 124 couples with the thrust piece 131 of the lower surface that surrounds bearing housing 120 therein, thus thrust piece 131 through clog second protruding 124 and with second protruding 124 couple.

Bearing housing 120 is through bearing 140 interference fits, and the bottom of rotating shaft 150 is installed to be by bearing 140 supports and can in bearing 140, rotates.

Stator 160 has the iron core 161 of the outer rim that is couple to bearing housing 120, and is wrapped in the coil 165 on the iron core 161.

Rotor 170 be included on the rotating shaft 150 support and be exposed to bearing housing 120 the outside rotor yoke 171 and with stator 160 relatively and the magnet 175 that couples with rotor yoke 171.

Therefore, when electric current was applied to coil 165, rotor 170 and rotating shaft 150 were through being formed on the electromagnetic field rotation between coil 165 and the magnet 175.

Rotor yoke 171 is installed disc 50 also as turntable on said turntable.Felt 163 is installed in the upper periphery place of rotor yoke 171, is used to prevent that mounted disc 50 from sliding.

The clip 180 that can flexibly support disc 50 and stop mounted disc 50 upwards to leave rotor yoke 171 is installed on the neighboring of the rotor yoke 171 that is couple to rotating shaft 150, so that make the center of mounted disc 50 and the centrally aligned of rotating shaft 150.

Unaccounted Reference numeral 135 defines thrust plate, is used for preventing that through the bottom of supporting rotating shaft 150 rotating shaft 150 and thrust piece 131 from being galled.

Outer rim first protruding 122 and couple between the inner edge in hole 112 and have gap (G) couples in the hole 112 so that help easily first protruding 122 of bearing housing 120 to be inserted into.Therefore, be assembled together, and after base 110 is assembled together with product, leave from the precalculated position of product and the similar big distance in gap (G) as the rotating shaft 150 of pivot at bearing housing 120 and base 110.

According to the spindle motor of exemplary embodiment of the present invention, bearing housing 120 always through compensation bearing housing 120 first protruding 122 and couple the gap (G) between the hole 112, be couple to the presumptive area of base 110.Bearing housing 120 and base 110 coupling structurally will further describe with reference to figure 3 and Fig. 4, and wherein Fig. 4 is the perspective view of bearing shown in Fig. 3 and bearing housing.

With reference to figure 3 and Fig. 4, the upper surface of the lower surface of bearing housing 120 contact base 110, the outer rim that is inserted into first convexity 122 that couples hole 112 is formed with the guidance part 126 that contact couples the inner edge in hole 112.

At this moment, guidance part 126 is formed the rear surface from first protruding 122 approximate centre to bearing housing 120.In addition, guidance part 126 forms towards the rear surface tilt ground of bearing housing 120, and its thickness radially is gradually thick.The reason that guidance part 126 is tilted is easily guidance part 126 to be inserted into to couple in the hole 112.

Couple in the hole 112 when bearing housing 120 is pressed downward to allow first protruding 122 upside to be inserted into, first protruding 122 lower part side is inserted into when coupling in the hole 112 simultaneously, and the lower part side of guidance part 126 begins to be inserted into and couples in the hole 112.

When the upside of guidance part 126 is inserted into when coupling in the hole 112, the outer rim of guidance part 126 forms with the inner edge that couples hole 112 and contact, and bearing housing 120 is mobile on base 110 thus.In this case, if first protruding 122 lower side is clogged, then bearing housing 120 is couple to the presumptive area of base 110, thereby when base 110 was couple to product, all positioning parts of spindle motor were to the presumptive area of base.

At this moment, make external diameter from the lower side of its guidance part that begins to tilt 126, thereby guidance part 126 is press fit into and couple in the hole 112 greater than the internal diameter that couples hole 112.

Fig. 5 is the sectional view according to the amplification of the major part of the spindle motor of another exemplary embodiment of the present invention, and wherein guidance part 226 is projected into the outside with multilayer from first protruding 222 outer rim of bearing housing 220, thus said outer rim axioversion.

Spindle motor according to the present invention is formed on the outer rim place of first convexity of bearing housing, and said bearing housing has the gap with respect to the inner edge that couples the hole of base, and guidance part contact simultaneously couples the inner edge in hole.Thus, through guidance part bearing housing is not moved on base, bearing housing always is couple to the presumptive area of base thus.Therefore, when the base that is equipped with parts was couple to product, parts always were positioned the presumptive area of product.Therefore, improved product reliability.

Any " embodiment ", " embodiment " that this specification is quoted, " exemplary embodiment " etc. mean that special characteristic, structure or the characteristics described in conjunction with said embodiment are included among the disclosed embodiment at least.The such word that in specification, occurs everywhere is unnecessary all to refer to same embodiment.In addition, when combining any embodiment to describe special characteristic, structure or characteristics, change these characteristics, structure or characteristics, be considered to be in those skilled in the art's the understanding scope in conjunction with other embodiment.

Though described embodiments of the invention with reference to certain exemplary embodiment, yet it should be understood that those skilled in the art can design many other modifications and embodiment, they all drop in the spirit and scope of principle of the present invention.More specifically, to the possible various changes of the configuration of components and/or main body assembled arrangement with revise all in the scope of the disclosure, accompanying drawing and appended claims.Except change and the modification to components and/or configuration, it also is conspicuous to those skilled in the art that replacement is used.

Claims

1. spindle motor comprises:

Rotating shaft;

Rotatably support the bearing of said rotating shaft;

Said Bearing Installation bearing housing therein, and said bearing housing is formed with first convexity on the end that is formed on said bearing housing highlightedly; And

Base; Form the hole that couples that is connected with said first convexity on it; Wherein said first convexity comprises guidance part; The said zone that couples the inner edge in hole of contact in the said guidance part is formed obliquely, and said guidance part is formed the rear surface from the said first protruding approximate centre to said bearing housing, and said guidance part forms towards the rear surface tilt ground of said bearing housing; The radial thickness of said guidance part is thickening gradually, and the said part that contacts with said guidance part that couples the inner peripheral surface in hole is formed obliquely.

2. spindle motor as claimed in claim 1, wherein, said guidance part is given prominence to towards the said first protruding outer rim, to fill the said first protruding and said gap that couples between the hole.

3. spindle motor as claimed in claim 2, wherein, in the upper surface position of the said base that accommodates said bearing housing, the external diameter of said guidance part is greater than the said internal diameter that couples the hole.

4. spindle motor as claimed in claim 3, wherein, said guidance part is press fit into said coupling in the hole.

5. spindle motor as claimed in claim 1 also comprises second convexity of the inboard that is arranged on said first convexity, so that couple through the thrust piece of filling with the lower surface that surrounds said bearing housing.

6. spindle motor comprises:

Base is formed with on it and couples the hole;

Bearing housing, it has through filling and is inserted into said first convexity that couples in the hole, and is vertically mounted on the said base;

Be fixed on the inner bearing of said bearing housing;

Can support ground and be rotatably installed in the rotating shaft in the said bearing;

Be couple to said rotating shaft with said rotating shaft rotor rotated simultaneously; And

Arrange stator around said bearing housing with rotor,

Wherein said first convexity comprises guidance part; The said zone that couples the inner edge in hole of contact in the said guidance part is formed obliquely; Said guidance part is formed the rear surface from the said first protruding approximate centre to said bearing housing; Said guidance part forms towards the rear surface tilt ground of said bearing housing, and the radial thickness of said guidance part is thickening gradually, and the said part that contacts with said guidance part that couples the inner peripheral surface in hole is formed obliquely.

7. spindle motor as claimed in claim 6; Wherein, The cross section of said bearing housing contacts said base; Said first convexity forms from being inserted into a said cross section that couples the said bearing housing in hole extensiblely, and said guidance part is formed from a cross section of said bearing housing to the said first protruding approximate centre part.

8. spindle motor as claimed in claim 7, wherein, said guidance part forms with multilayer from the said first protruding outer rim highlightedly.

9. spindle motor as claimed in claim 8, wherein, the external diameter in the zone that said guidance part begins to tilt is greater than the said internal diameter that couples the hole.

10. spindle motor as claimed in claim 9, wherein, said guidance part is press fit into said coupling in the hole.

11. spindle motor as claimed in claim 6 wherein, is formed with second convexity at a cross section of the said bearing housing of the said first protruding inboard.